Clean up trailing whitespace in the kernel headers.

And fix the scripts so they stop letting trailing whitespace through.

Change-Id: Ie109fbe1f63321e565ba0fa60fee8e9cf3a61cfc
diff --git a/libc/kernel/common/linux/ip.h b/libc/kernel/common/linux/ip.h
index 14c3464..16ecb23 100644
--- a/libc/kernel/common/linux/ip.h
+++ b/libc/kernel/common/linux/ip.h
@@ -78,10 +78,10 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPOPT_EOL IPOPT_END
 #define IPOPT_TS IPOPT_TIMESTAMP
-#define IPOPT_TS_TSONLY 0  
-#define IPOPT_TS_TSANDADDR 1  
+#define IPOPT_TS_TSONLY 0
+#define IPOPT_TS_TSANDADDR 1
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define IPOPT_TS_PRESPEC 3  
+#define IPOPT_TS_PRESPEC 3
 struct iphdr {
 #ifdef __LITTLE_ENDIAN_BITFIELD
  __u8 ihl:4,